<template>
  <div class="login_container">
    <!-- 登录头部 -->
    <div class="login_box">
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 登录表单区域 -->
      <el-form
        ref="LoginFormRef"
        :model="LoginForm"
        :rules="LoginFormRules"
        class="login_form"
      >
        <el-form-item prop="username">
          <el-input
            v-model="LoginForm.username"
            prefix-icon="iconfont icon-bianzubeifen"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="LoginForm.password"
            prefix-icon="iconfont icon-bianzubeifen4"
            type="password"
          ></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button @click="login" type="primary">登录</el-button>
          <el-button @click="resetForm" type="info">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
    export default {
        data() {
            return {
                LoginForm: {
                    username: 'admin',
                    password: '123456'
                },
                LoginFormRules: {
                    username: [{
                        required: true,
                        message: '请输入用户名',
                        trigger: 'blur'
                    }, {
                        min: 3,
                        max: 10,
                        message: '长度在 3 到 10 个字符',
                        trigger: 'blur'
                    }],
                    password: [{
                        required: true,
                        message: '请输入密码',
                        trigger: 'blur'
                    }, {
                        min: 3,
                        max: 10,
                        message: '长度在 3 到 10 个字符',
                        trigger: 'blur'
                    }]
                }
            }
        },
        methods: {
            resetForm() {
                console.log(this)
                this.$refs.LoginFormRef.resetFields()
            },

            login() {
                this.$refs.LoginFormRef.validate(async valid => {
                    if (!valid) return
                    const {
                        data: res
                    } = await this.$http.post('login', this.LoginForm)
                    console.log(res)
                    if (res.meta.status !== 200) return this.$message.error('登陆失败!')
                    this.$message.success('登录成功!')

                    // sessionStorage是当前会话中使用，localStorage是持久存储
                    window.sessionStorage.setItem('token', res.data.token)
                        // 通过编程式导航跳转到后台主页，路由地址是 /home
                    this.$router.push('/home')
                })
            }
        }
    }
</script>

<style lang="less" scoped>
    .login_container {
        background-color: #2b4b6b;
        height: 100%;
    }
    
    .login_box {
        width: 450px;
        height: 300px;
        background-color: #fff;
        border-radius: 3px;
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
    }
    
    .avatar_box {
        width: 130px;
        height: 130px;
        border: 1px solid #eee;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #ddd;
        position: absolute;
        left: 50%;
        transform: translate(-50%, -50%);
        background-color: #fff;
        img {
            height: 100%;
            width: 100%;
            border-radius: 50%;
            background-color: #eee;
        }
    }
    
    .login_form {
        position: absolute;
        bottom: 0;
        width: 100%;
        padding: 0 10px;
        box-sizing: border-box;
    }
    
    .btns {
        display: flex;
        justify-content: flex-end;
    }
    /* less表示这里支持less语法 */
</style>